Unraveling the degradation mechanism for the hydrogen storage property of Fe nanocatalyst-modified MgH₂
Maintaining fast hydrogen storage kinetics is a key challenge for the practical application of MgH2. To address this challenge, understanding the mechanism of kinetics that declines during cycling is crucial but it has not been systematically investigated to date. In this paper, three different Fe...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/163054 |
| _version_ | 1811693399766466560 |
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| author | Song, Mengchen Zhang, Liuting Yao, Zhendong Zheng, Jiaguang Shang, Danhong Chen, Lixin Li, Hong |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Song, Mengchen Zhang, Liuting Yao, Zhendong Zheng, Jiaguang Shang, Danhong Chen, Lixin Li, Hong |
| author_sort | Song, Mengchen |
| collection | NTU |
| description | Maintaining fast hydrogen storage kinetics is a key challenge for the practical application of MgH2. To
address this challenge, understanding the mechanism of kinetics that declines during cycling is crucial
but it has not been systematically investigated to date. In this paper, three different Fe nanocatalysts were
synthesized and then doped into MgH2 to form new composites. The MgH2-Fe composite had significantly reduced operating temperatures and activation energy compared to that of undoped MgH2. During
cycling, a capacity retention of 93.4% was obtained after the 20th cycle. For a better understanding of the
declining performance, prolonged incubation was intentionally performed. Grain growth was found in
MgH2 and the Fe nanocatalysts, which was directly responsible for capacity loss and kinetic degradation.
These findings provide fundamental insights to facilitate designing and preparing catalytic hydrogen
storage systems with superior cycling performance. |
| first_indexed | 2024-10-01T06:51:04Z |
| format | Journal Article |
| id | ntu-10356/163054 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:51:04Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1630542022-11-18T01:35:42Z Unraveling the degradation mechanism for the hydrogen storage property of Fe nanocatalyst-modified MgH₂ Song, Mengchen Zhang, Liuting Yao, Zhendong Zheng, Jiaguang Shang, Danhong Chen, Lixin Li, Hong School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Activation Energy Capacity Retention Maintaining fast hydrogen storage kinetics is a key challenge for the practical application of MgH2. To address this challenge, understanding the mechanism of kinetics that declines during cycling is crucial but it has not been systematically investigated to date. In this paper, three different Fe nanocatalysts were synthesized and then doped into MgH2 to form new composites. The MgH2-Fe composite had significantly reduced operating temperatures and activation energy compared to that of undoped MgH2. During cycling, a capacity retention of 93.4% was obtained after the 20th cycle. For a better understanding of the declining performance, prolonged incubation was intentionally performed. Grain growth was found in MgH2 and the Fe nanocatalysts, which was directly responsible for capacity loss and kinetic degradation. These findings provide fundamental insights to facilitate designing and preparing catalytic hydrogen storage systems with superior cycling performance. Submitted/Accepted version The authors appreciatively acknowledge the financial support from the National Natural Science Foundation of China (Grant No. 51801078) and the Nature Science Foundation of Jiangsu Province (Grant No. BK202110884). 2022-11-18T01:35:41Z 2022-11-18T01:35:41Z 2022 Journal Article Song, M., Zhang, L., Yao, Z., Zheng, J., Shang, D., Chen, L. & Li, H. (2022). Unraveling the degradation mechanism for the hydrogen storage property of Fe nanocatalyst-modified MgH₂. Inorganic Chemistry Frontiers, 9(15), 3874-3884. https://dx.doi.org/10.1039/D2QI00863G 2052-1553 https://hdl.handle.net/10356/163054 10.1039/D2QI00863G 15 9 3874 3884 en Inorganic Chemistry Frontiers © 2022 the Partner Organisations. All rights reserved. This paper was published by Royal Society of Chemistry in Inorganic Chemistry Frontiers and is made available with permission of the Partner Organisations. application/pdf |
| spellingShingle | Engineering::Mechanical engineering Activation Energy Capacity Retention Song, Mengchen Zhang, Liuting Yao, Zhendong Zheng, Jiaguang Shang, Danhong Chen, Lixin Li, Hong Unraveling the degradation mechanism for the hydrogen storage property of Fe nanocatalyst-modified MgH₂ |
| title | Unraveling the degradation mechanism for the hydrogen storage property of Fe nanocatalyst-modified MgH₂ |
| title_full | Unraveling the degradation mechanism for the hydrogen storage property of Fe nanocatalyst-modified MgH₂ |
| title_fullStr | Unraveling the degradation mechanism for the hydrogen storage property of Fe nanocatalyst-modified MgH₂ |
| title_full_unstemmed | Unraveling the degradation mechanism for the hydrogen storage property of Fe nanocatalyst-modified MgH₂ |
| title_short | Unraveling the degradation mechanism for the hydrogen storage property of Fe nanocatalyst-modified MgH₂ |
| title_sort | unraveling the degradation mechanism for the hydrogen storage property of fe nanocatalyst modified mgh₂ |
| topic | Engineering::Mechanical engineering Activation Energy Capacity Retention |
| url | https://hdl.handle.net/10356/163054 |
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